Mark:

My _guess_ is that it is not necessary, everything else being equal.  The
first generation of FI on the Vanagons didn't have an O2 sensor; if the
car was setup properly, and nothing changed, then the FI should supply
the "proper" mixture over the operating range.

The O2 sensor provides feedback to the ECU for fine-tuning of the
mixture, so if everything was adjusted properly before, replacing the
sensor shouldn't affect anything.  In fact, the adjustment of CO is done
with the sensor out of the loop.

On Wed, 13 May 1998, Mark McCulley wrote:

> Should you set the CO (mixture) adjustment after installing a new O2 sensor?

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Tom Young               young@sherlock.SIMS.Berkeley.EDU
Lafayette, CA  94549    '81 Vanagon
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